The Netflix documentary “Becoming” follows Michelle Obama on her nationwide book tour, as she dazzles intimate groups of young women and packed arenas of fans alike. She’s enormously charismatic and a gifted storyteller, but Nadia Hallgren’s depiction of the media-savvy former first lady isn’t quite as “unplugged” as the trailer would suggest or viewers might like to see. Still, Obama is always enjoyable company, and her message of warmth and hope is especially welcome these days. My review, at RogerEbert.com.